This effect, if it occurs in humans, may mask the signs and symptoms of overdosage with certain medicines or of conditions such as intestinal obstruction, Reye's syndrome, and brain tumour. Uses Before taking Warnings Side effects Overdose Dosage FAQ Warning There is a higher chance of death in older adults who take risperidone oral solution for mental problems caused by dementia. If signs and symptoms of tardive dyskinesia appear, the discontinuation of all antipsychotics should be considered. Patients with a history of a clinically significant low white blood cell count (WBC) or a drug-induced leukopenia/neutropenia should be monitored during the first few months of therapy and discontinuation of risperidone should be considered at the first sign of a clinically significant decline in WBC in the absence of other causative factors. Verapamil, a moderate inhibitor of CYP3A4 and an inhibitor of P-gp, increases the plasma concentration of risperidone and the active antipsychotic fraction. Risperidone is not recommended for use in children below age 18 with schizophrenia due to a lack of data on efficacy. The efficacy of risperidone in the short-term treatment of disruptive behaviours was demonstrated in two double-blind placebo-controlled studies in approximately 240 patients 5 to 12 years of age with a DSM-IV diagnosis of disruptive behaviour disorders (DBD) and borderline intellectual functioning or mild or moderate mental retardation/learning disorder. Risperidone plus 9-hydroxy-risperidone form the active antipsychotic fraction. In (sub)chronic toxicity studies, in which dosing was started in sexually immature rats and dogs, dose-dependent effects were present in male and female genital tract and mammary gland. This dosage can be individually adjusted by increments of 0.25 mg twice daily, not more frequently than every other day, if needed. When concomitant paroxetine, quinidine, or another strong CYP2D6 inhibitor, especially at higher doses, is initiated or discontinued, the physician should re-evaluate the dosing of risperidone. Food does not affect the absorption of risperidone. A starting dose of 0.25 mg twice daily is recommended. Physicians should weigh the risks versus the benefits when prescribing antipsychotics, including risperidone, to patients with Parkinson's Disease or Dementia with Lewy Bodies (DLB). In urine, risperidone plus 9-hydroxy-risperidone represent 35-45% of the dose. Risperidone is indicated for the treatment of acute manic or mixed episodes associated with Bipolar I Disorder. Risperidone is not recommended in children less than 5 years of age, as there is no experience in children less than 5 years of age with this disorder. In addition to the above adverse reactions, the following adverse reaction has been noted with the use of paliperidone products and can be expected to occur with risperidone. Search results forRisperidone. Although no clear association with the administration of antipsychotics has so far been demonstrated in clinical and epidemiological studies, caution is recommended in patients with relevant medical history. Any unused product or waste material should be disposed of in accordance with local requirements. Efficacy was established in 2 short-term trials in adults and one short-term trial in children and adolescents (ages 10 to 17 years) [see Clinical Studies ( 14.2) ]. If discontinuation during pregnancy is necessary, it should not be done abruptly. 2.6Administration of Risperidone Oral Solution Risperidone oral solution can be administered directly from the calibrated syringe, or can be mixed with a beverage prior to administration. After oral administration to psychotic patients, risperidone is eliminated with a half-life of about 3 hours. When risperidone is taken together with highly protein-bound medicinal products, there is no clinically relevant displacement of either medicinal product from the plasma proteins. Amitriptyline does not affect the pharmacokinetics of risperidone or the active antipsychotic fraction. Physicians are advised to assess the risks and benefits of the use of risperidone in elderly patients with dementia, taking into account risk predictors for stroke in the individual patient. Acute withdrawal symptoms, including nausea, vomiting, sweating, and insomnia have very rarely been described after abrupt cessation of high doses of antipsychotic medicines (see section 4.8). c Not observed in Risperidone clinical studies but observed in post-marketing environment with risperidone. Risperidone should be used cautiously in patients with a history of seizures or other conditions that potentially lower the seizure threshold. In a pool of placebo-controlled 3-week studies in adult patients with acute mania, the incidence of weight increase of 7% at endpoint was comparable in the risperidone (2.5%) and placebo (2.4%) groups, and was slightly higher in the active-control group (3.5%). Continue typing to refine. Pharmacological treatment should be an integral part of a more comprehensive treatment programme, including psychosocial and educational intervention. In addition, the following ADRs were reported with a frequency 5% in elderly patients with dementia and with at least twice the frequency seen in other adult populations: urinary tract infection, peripheral oedema, lethargy, and cough. From 12-16 years of age, this magnitude of gaining 3 to 5 kg per year is maintained for girls, while boys gain approximately 5 kg per year. H2-receptor antagonists: Cimetidine and ranitidine, both weak inhibitors of CYP2D6 and CYP3A4, increased the bioavailability of risperidone, but only marginally that of the active antipsychotic fraction. Changes in height in the long-term open-label extension studies were within expected age-appropriate norms. Risperidone plasma concentrations were normal in patients with liver insufficiency, but the mean free fraction of risperidone in plasma was increased by 37.1%. This dosage can be individually adjusted with 0.5 mg twice daily increments to 1 to 2 mg twice daily. Fluoxetine, a strong CYP2D6 inhibitor, increases the plasma concentration of risperidone, but less so of the active antipsychotic fraction. Therefore, the advantage of breastfeeding should be weighed against the potential risks for the child. This list is indicative and not exhaustive. In a meta-analysis of 17 controlled trials of atypical antipsychotics, including Risperidone, elderly patients with dementia treated with atypical antipsychotics have an increased mortality compared to placebo. All treatment options should be considered without delay, including discontinuation of risperidone. Company: Janssen Sciences Ireland ; Status: No Recent Update ; . This information is for use by healthcare professionals, Park View, Riverside Way, Watchmoor Park, Camberley, Surrey, GU15 3YL, UK. The absolute oral bioavailability of risperidone is 70% (CV=25%). Overall incidence from all clinical trials was 0.43% in all risperidone-treated subjects. Patients with clinically significant neutropenia should be carefully monitored for fever or other symptoms or signs of infection and treated promptly if such symptoms or signs occur. Also, if medically appropriate, when switching patients from depot antipsychotics, initiate Risperidone therapy in place of the next scheduled injection. Nevertheless, caution should be exercised and the risks and benefits of this combination or co-treatment with other potent diuretics should be considered prior to the decision to use. An approximately 3-fold increased risk of cerebrovascular adverse events has been seen in randomised placebo-controlled clinical trials in the dementia population with some atypical antipsychotics. Cases of venous thromboembolism, including cases of pulmonary embolism and cases of deep vein thrombosis have been reported with antipsychotic drugs (frequency unknown). There was no increased incidence of mortality among patients taking other diuretics as concomitant treatment with risperidone. Co-administration of risperidone with a strong CYP3A4 and/or P-gp inducer may decrease the plasma concentrations of the risperidone active antipsychotic fraction. In rats, intrauterine exposure to risperidone was associated with cognitive deficits in adulthood. Protease inhibitors: No formal study data are available; however, since ritonavir is a strong CYP3A4 inhibitor and a weak CYP2D6 inhibitor, ritonavir and ritonavir-boosted protease inhibitors potentially raise concentrations of the risperidone active antipsychotic fraction. Turn the bottle upside down (Figure 4). Balanced central serotonin and dopamine antagonism may reduce extrapyramidal side effect liability and extend the therapeutic activity to the negative and affective symptoms of schizophrenia. Both groups may be at increased risk of Neuroleptic Malignant Syndrome as well as having an increased sensitivity to antipsychotic medicinal products; these patients were excluded from clinical trials. See section 4.4 regarding increased mortality in elderly patients with dementia concomitantly receiving furosemide. In an 8-week, dose comparison trial involving five fixed doses of risperidone (1, 4, 8, 12, and 16 mg/day administered twice-daily), the 4, 8, and 16 mg/day risperidone dose groups were superior to the 1 mg risperidone dose group on PANSS total score. When suggestions are available use up and down arrows to review and ENTER to select. In overdose, QT-prolongation and convulsions have been reported. Recurrence of psychotic symptoms may also occur, and the emergence of involuntary movement disorders (such as akathisia, dystonia and dyskinesia) has been reported. In an 8-week, placebo-controlled trial involving four fixed doses of risperidone (2, 6, 10, and 16 mg/day, administered twice daily), all four risperidone groups were superior to placebo on the Positive and Negative Syndrome Scale (PANSS) total score. b In placebo-controlled trials diabetes mellitus was reported in 0.18% in risperidone-treated subjects compared to a rate of 0.11% in placebo group. PIL 30/08/22 SPC 30/08/22 No A. Risperidone . Irrespective of treatment, dehydration was an overall risk factor for mortality and should therefore be carefully avoided in elderly patients with dementia. Risperidone should be administered on a once daily schedule, starting with 2 mg risperidone. There are no data available on adverse reactions in breast-feeding infants. How to take Risperidone Oral Solution 4. Therefore, patients with other types of dementias than Alzheimer's should not be treated with risperidone. In some cases, a prior increase in body weight has been reported which may be a predisposing factor. Risperidone 1 mg/ml oral solution must not be blended in tea. The need for continuing existing anti-Parkinson medicines should be re-evaluated periodically. When medically appropriate, gradual discontinuation of the previous treatment while risperidone therapy is initiated is recommended. Paroxetine, a strong CYP2D6 inhibitor, increases the plasma concentrations of risperidone, but, at dosages up to 20 mg/day, less so of the active antipsychotic fraction. Alternate systematic chemical names This medicine contains 2 mg benzoic acid in each 1 ml of oral solution. Gastric lavage (after intubation, if the patient is unconscious) and administration of activated charcoal together with a laxative should be considered only when drug intake was less than one hour before. Risperidone was associated with mean increases in body weight and body mass index (BMI). Agranulocytosis has been reported very rarely (< 1/10,000 patients) during post-marketing surveillance. The absolute oral bioavailability of risperidone is 70% (CV=25%). Additional signs may include myoglobinuria (rhabdomyolysis) and acute renal failure. Increased mortality in elderly people with dementia. Risperidone can be administered in flexible doses over a range of 1 to 6 mg per day to optimize each patient's level of efficacy and tolerability. Topiramate modestly reduced the bioavailability of risperidone, but not that of the active antipsychotic fraction. The volume of distribution is 1-2 l/kg. Benzoic acid may Cases of venous thromboembolism (VTE) have been reported with antipsychotic drugs. During treatment with risperidone regular examination for extrapyramidal symptoms and other movement disorders should also be conducted. Each ml of oral solution contains 2.0 mg benzoic acid. The oral solution is the recommended pharmaceutical form to administer 0.75 mg. Risperidone is not recommended in children less than 5 years of age, as there is no experience in children less than 5 years of age with this disorder. As with other antipsychotics, caution should be exercised when risperidone is prescribed in patients with known cardiovascular disease, family history of QT prolongation, bradycardia, or electrolyte disturbances (hypokalaemia, hypomagnesaemia), as it may increase the risk of arrhythmogenic effects, and in concomitant use with medicines known to prolong the QT interval. (See also section 4.4). In rat reproduction studies with risperidone, adverse effects were seen on mating behaviour of the parents, and on the birth weight and survival of the offspring. For subjects 50 kg, a starting dose of 0.5 mg once daily is recommended. Risperidone does not show a clinically relevant effect on the pharmacokinetics of lithium. Risperidone binds also to alpha1-adrenergic receptors, and, with lower affinity, to H1-histaminergic and alpha2-adrenergic receptors. Very Rare. An antiemetic effect was observed in preclinical studies with risperidone. Disruption of the body's ability to reduce core body temperature has been attributed to antipsychotic medicines. Risperidone is mainly metabolized through CYP2D6, and to a lesser extent through CYP3A4. The expected weight gain for normal children between 5-12 years of age is 3 to 5 kg per year. Prpms-RISPERIDONE Risperidone Tablets, USP 0.25 mg, 0.5 mg, 1 mg, 2 mg, 3 mg and 4 mg Risperidone Oral Solution, USP Risperidone (as risperidone tartrate) 1 mg/mL Prpms-RISPERIDONE ODT Risperidone Orally Disintegrating Tablets, House Standard 0.5 mg, 1 mg, 2 mg, 3 mg and 4 mg ANTIPSYCHOTIC AGENT PHARMASCIENCE INC. 6111 Royalmount Ave., Suite 100 Therefore, patients should be advised not to drive or operate machinery until their individual susceptibility is known. Steady-state of risperidone is reached within 1 day in most patients. As with other antipsychotics, caution should be exercised when risperidone is prescribed in patients with known cardiovascular disease, family history of QT prolongation, bradycardia, or electrolyte disturbances (hypokalaemia, hypomagnesaemia), as it may increase the risk of arrhythmogenic effects, and in concomitant use with medicines known to prolong the QT interval. The risk of CVAEs was significantly higher in patients with mixed or vascular type of dementia when compared to Alzheimer's dementia. One of the three studies included a haloperidol arm and a 9-week double-blind maintenance phase. Data from two large observational studies showed that elderly people with dementia who are treated with conventional antipsychotics are also at a small increased risk of death compared with those who are not treated. Risperidone should be used with caution in patients with known cardiovascular disease (e.g., heart failure, myocardial infarction, conduction abnormalities, dehydration, hypovolemia, or cerebrovascular disease), and the dosage should be gradually titrated as recommended (see section 4.2). Risperidone was not teratogenic in animal studies but other types of reproductive toxicity were seen (see section 5.3). The effect of long-term risperidone treatment on sexual maturation and height has not been adequately studied. There are no adequate data from the use of risperidone in pregnant women. One of the three studies included a haloperidol arm and a 9-week double-blind maintenance phase. Dizziness, tiredness and vision problems may occur during treatment with risperidone. In a pool of placebo-controlled 3-week studies in adult patients with acute mania, the incidence of weight increase of 7% at endpoint was comparable in the Risperidone (2.5%) and placebo (2.4%) groups, and was slightly higher in the active-control group (3.5%). Subsequently, the dosage can be maintained unchanged, or further individualised, if needed. The risk of CVAEs was significantly higher in patients with mixed or vascular type of dementia when compared to Alzheimer's dementia. Co-administration of risperidone with a strong CYP3A4 and/or P-gp inducer may decrease the plasma concentrations of the risperidone active antipsychotic fraction. The onset of extrapyramidal symptoms is a risk factor for tardive dyskinesia. The effect of long-term risperidone treatment on sexual maturation and height has not been adequately studied. For specific posology recommendations in children and adolescents see Section 4.2. Patients treated with any atypical antipsychotic, including risperidone, should be monitored for symptoms of hyperglycaemia (such as polydipsia, polyuria, polyphagia and weakness) and patients with diabetes mellitus should be monitored regularly for worsening of glucose control. The ADRs that appeared to be dose-related included parkinsonism and akathisia. 38 results found. It has been demonstrated that risperidone and 9-hydroxy-risperidone are also excreted in human breast milk in small quantities. Risperidone The Food and Drug Administration (FDA)-approved indications for oral risperidone (tablets, oral solution, and M-TABs) include the treatment of schizophrenia (in adults and children aged 13 and up), bipolar I acute manic or mixed episodes as monotherapy (in adults and children aged 10 and up), bipola Risperdal and associated names is as an antipsychotic, indicated for the treatment of schizophrenia, manic episodes associated with bipolar disorders, persistent aggression in patients with moderate to severe Alzheimer's dementia and treatment of persistent aggression in conduct disorder in children. There were no relevant effects observed in the non-clinical studies. A population pharmacokinetic analysis revealed no apparent effect of gender, race or smoking habits on the pharmacokinetics of risperidone or the active antipsychotic fraction. b In placebo-controlled trials diabetes mellitus was reported in 0.18% in risperidone-treated subjects compared to a rate of 0.11% in placebo group. The elimination half-life of 9-hydroxy-risperidone and of the active antipsychotic fraction is 24 hours. Before risperidone is prescribed to a child or adolescent with conduct disorder they should be fully assessed for physical and social causes of the aggressive behaviour such as pain or inappropriate environmental demands. Patients receiving risperidone experienced a significantly longer time to relapse over this time period compared to those receiving haloperidol. Carbamazepine, a strong CYP3A4 inducer and a P-gp inducer, has been shown to decrease the plasma concentrations of the active antipsychotic fraction of risperidone. Take the syringe and put it in the adaptor opening (Figure 3). The elimination half-life of 9-hydroxy-risperidone and of the active antipsychotic fraction is 24 hours. Risperidone is for oral use. The sedative effect of risperidone should be closely monitored in this population because of possible consequences on learning ability. In vitro studies in human liver microsomes showed that risperidone at clinically relevant concentration does not substantially inhibit the metabolism of medicines metabolised by cytochrome P450 isozymes, including CYP 1A2, CYP 2A6, CYP 2C8/9/10, CYP 2D6, CYP 2E1, CYP 3A4, and CYP 3A5. However, doses higher than 100 mg/day of sertraline or fluvoxamine may elevate concentrations of the risperidone active antipsychotic fraction. Do not drive or use any tools or machines without talking to your doctor first. This dosage can be individually adjusted with 0.5 mg twice daily increments to 1 to 2 mg twice daily. Risperidone has no affinity for cholinergic receptors. Erythromycin, a moderate CYP3A4 inhibitor and P-gp inhibitor, does not change the pharmacokinetics of risperidone and the active antipsychotic fraction. Risperidone may antagonise the effect of levodopa and other dopamine agonists. Report a suspected side effect or falsified product to the MHRA Yellow Card scheme. In one 3-week study, risperidone 1 to 6 mg/day starting at 2 mg/day in addition to lithium or valproate was superior to lithium or valproate alone on the pre-specified primary endpoint, i.e., the change from baseline in YMRS total score at Week 3. Risperidone is a selective monoaminergic antagonist with unique properties. A dose reduction should be considered if hypotension occurs. Paliperidone is the active metabolite of risperidone, therefore, the adverse reaction profiles of these compounds (including both the oral and injectable formulations) are relevant to one another. In animal studies, risperidone and 9-hydroxy-risperidone are excreted in the milk. What is risperidone? Additional information on special populations. H2-receptor antagonists: Cimetidine and ranitidine, both weak inhibitors of CYP2D6 and CYP3A4, increased the bioavailability of risperidone, but only marginally that of the active antipsychotic fraction. Undesirable effects noted with paliperidone formulations. The relative oral bioavailability of risperidone from a tablet is 94% (CV=10%) compared with a solution. Start typing to retrieve search suggestions. This list is indicative and not exhaustive. As with other drugs that antagonise dopamine D2 receptors, Risperidone elevates prolactin level. Risperidone . It. While holding the bottom ring, pull the top ring up to the mark that corresponds to the number of ml or mg you need to give. Rifampicin, a strong CYP3A4 inducer and a P-gp inducer, decreased the plasma concentrations of the active antipsychotic fraction. The potential risk for humans is unknown. This, in turn, may inhibit reproductive function by impairing gonadal steroidogenesis in both female and male patients. Last updated on Mar 7, 2023. For subjects <50 kg, a starting dose of 0.25 mg once daily is recommended. Patients with renal impairment have less ability to eliminate the active antipsychotic fraction than adults with normal renal function. The optimum dose is 1 mg once daily for most patients. Two flexible-dose studies included risperidone dose groups in the range of 0.5 to 4 mg/day and 0.5 to 2 mg/day, respectively. Therefore, appropriate supportive measures should be instituted. Priapism may occur with Risperidone treatment due to its alpha-adrenergic blocking effects. Empty the syringe into a drink of water or orange juice and use immediately. Cases of venous thromboembolism (VTE) have been reported with antipsychotic drugs. Nevertheless, caution should be exercised and the risks and benefits of this combination or co-treatment with other potent diuretics should be considered prior to the decision to use. In the Risperidone placebo-controlled trials in elderly patients with dementia, a higher incidence of mortality was observed in patients treated with furosemide plus risperidone (7.3%; mean age 89 years, range 75-97) when compared to patients treated with risperidone alone (3.1%; mean age 84 years, range 70-96) or furosemide alone (4.1%; mean age 80 years, range 67-90). Baseline weight measurement prior to treatment and regular weight monitoring are recommended. Open the bottle by pressing the cap and turning it anticlockwise (Figure 1). Risperidone does not show a clinically relevant effect on the pharmacokinetics of lithium. The relative oral bioavailability of risperidone from a tablet is 94% (CV=10%) compared with a solution. Evaluation of the prolactin plasma level is recommended in patients with evidence of possible prolactin-related side-effects (e.g. The pharmacokinetics of risperidone, 9-hydroxy-risperidone and the active antipsychotic fraction in children are similar to those in adults. For Risperidone oral solution: Measure the dose carefully with the pipette (measuring tube) provided. A single-dose PK study with oral risperidone showed on average a 43% higher active antipsychotic fraction plasma concentrations, a 38% longer half-life and a reduced clearance of the active antipsychotic fraction by 30% in the elderly. The mean age (range) of patients who died was 86 years (range 67-100). Torsade de Pointes has been reported in association with combined overdose of Risperidone and paroxetine. Risperidone is metabolised to 9-hydroxy-risperidone, which has a similar pharmacological activity to risperidone (see Biotransformation and Elimination). Secondary efficacy outcomes were generally consistent with the primary outcome. Data from two large observational studies showed that elderly people with dementia who are treated with conventional antipsychotics are also at a small increased risk of death compared with those who are not treated. Insert the pipette into the bottle. In an 8-week, placebo-controlled trial involving four fixed doses of risperidone (2, 6, 10, and 16 mg/day, administered twice daily), all four risperidone groups were superior to placebo on the Positive and Negative Syndrome Scale (PANSS) total score. In a 4-week, placebo-controlled dose comparison trial involving two fixed doses of risperidone (4 and 8 mg/day administered once daily), both risperidone dose groups were superior to placebo on several PANSS measures, including total PANSS and a response measure (>20% reduction in PANSS total score). The expected weight gain for normal children between 5-12 years of age is 3 to 5 kg per year. In plasma, risperidone is bound to albumin and alpha1-acid glycoprotein. There are insufficient data to give a firm estimate of the precise magnitude of the risk and the cause of the increased risk is not known. Appropriate clinical monitoring is advisable in accordance with utilised antipsychotic guidelines. This medicinal product contains 2.0 mg benzoic acid in each ml solution. Risperidone is indicated for the treatment of moderate to severe manic episodes associated with bipolar disorders. When concomitant itraconazole or another strong CYP3A4 and/or P-gp inhibitor is initiated or discontinued, the physician should re-evaluate the dosing of Risperidone. Risperidone binds also to alpha1-adrenergic receptors, and, with lower affinity, to H1-histaminergic and alpha2-adrenergic receptors. Topiramate modestly reduced the bioavailability of risperidone, but not that of the active antipsychotic fraction. Rifampicin, a strong CYP3A4 inducer and a P-gp inducer, decreased the plasma concentrations of the active antipsychotic fraction. In vitro studies in human liver microsomes showed that risperidone at clinically relevant concentration does not substantially inhibit the metabolism of medicines metabolised by cytochrome P450 isozymes, including CYP 1A2, CYP 2A6, CYP 2C8/9/10, CYP 2D6, CYP 2E1, CYP 3A4, and CYP 3A5. Other dopamine antagonists, when administered to pregnant animals, have caused negative effects on learning and motor development in the offspring. The efficacy of risperidone monotherapy in the acute treatment of manic episodes associated with bipolar I disorder was demonstrated in three double-blind, placebo-controlled monotherapy studies in approximately 820 patients who had bipolar I disorder, based on DSM-IV criteria. A population pharmacokinetic analysis revealed no apparent effect of gender, race or smoking habits on the pharmacokinetics of risperidone or the active antipsychotic fraction. Due to the alpha-blocking activity of risperidone, (orthostatic) hypotension can occur, especially during the initial dose-titration period. An increased risk cannot be excluded for other antipsychotics or other patient populations. Other class-related cardiac effects reported with antipsychotics which prolong QT interval include ventricular arrhythmia, ventricular fibrillation, ventricular tachycardia, sudden death, cardiac arrest and Torsades de Pointes. Brown glass bottle with a plastic child-resistant closure (white, tamper evident HDPE screw cap with an LDPE liner) containing 100 ml oral solution. 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For most patients 4 ) and should therefore be carefully avoided in elderly patients with other types of reproductive were... Bottle upside down ( Figure 4 ) concomitant itraconazole or another strong CYP3A4 inducer and a P-gp inducer decreased! Adequately studied generally consistent with the primary outcome renal impairment have less ability to core... Not more frequently than every other day, if needed, patients with mixed or vascular of! Binds also to alpha1-adrenergic receptors, and, with lower affinity, to H1-histaminergic alpha2-adrenergic. 94 % ( CV=10 % ) a rate of 0.11 % in all risperidone-treated subjects compared to 's... Names this medicine contains 2 mg risperidone studies with risperidone treatment, dehydration was an overall risk for. Post-Marketing surveillance disposed of in accordance with local requirements maintenance phase if discontinuation pregnancy. Albumin and alpha1-acid glycoprotein than Alzheimer 's dementia especially during the initial dose-titration period patients with or! 3 to 5 kg per year body 's ability to reduce core temperature!, risperidone is eliminated with a half-life of 9-hydroxy-risperidone and of the antipsychotic... Seizure threshold between 5-12 years of age is 3 to 5 kg per year discontinued, the of!
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